Presentations: Conference activities and invited talks

Conferences Activities (selection)


Doering K., Z. Zhang, Y. Dai, W. Dummann, R. A. Pickering, K. Bryka, T. Störling, C. Schröder-Adams, S. Richoz, M. Frank, J. Herrle, D. Harwood and D. Conley: ‘The Silica Cycle on a continental Shelf during the Upper Cretaceous: Reconstructions of Silicon Isotopes of Sponges, Radiolaria and Diatoms’. Contribution: Talk. Goldschmidt Conference 2023, 9-14 July, Lyon, France, 2023.

Dai Y., Z .Zhang, S. Richoz, K. Doering, F. M. Stamm, J. Yu, Z. Xu Sr., M. Frank and D. Conley: ‘Coupled marine silica and carbon cycle changes after the Palaeocene Eocene Thermal Maximum’. Contribution: Poster. Goldschmidt Conference 2023, 9-14 July, Lyon, France, 2023.

törling T., L. Friberg, L. Cassarino, Rebecca A. Pickering, K. Doering, F.M. Stamm, K. R. Hendry, S. Richoz and D. Conley:‘Effects of the K-Pg Boundary Event on the Ocean Silicon Cycle: What sponge spicule and radiolarian silicon isotopes can show us’. Contribution: Poster. Goldschmidt Conference 2023, 9-14 July, Lyon, France, 2023.


Doering K., J. Weiser, N. Lehmann, S.S. Kienast, M. Kienast, D. Hebbeln, M. Frank and R. Schneider: ‘Comparison of modern and Holocene nutrient cycling in the Labrador Sea: A multiproxy application of nitrogen and silicon isotopes’. Contribution: Poster. 14th International Conference on Paleoceanography (ICP14), Bergen, Norway.

Grasse P. and K. Doering: ‘Taxon specific fractionation in silicifiers: ‘What we know and what we don’t know!‘. Contribution: Talk. Isotopes in Biogenic Silica (IBiS2022), 14-16 June, Lund, Sweden, 2022.

Doering K., Laukert G., Kienast S. S., Kienast M., Kassens H. and M. Frank: ‘Differing silicon isotope compositions of sponge spicules from Arctic and North Atlantic shelf sediments‘. Contribution: Talk. Isotopes in Biogenic Silica (IBiS2022), 14-16 June, Lund, Sweden, 2022.


Laukert G., Grasse P., Novikhin A., Povazhny V., Doering K., Hölemann J., Janout M., Bauch D., Kassens H. and M. Frank: ‘Nutrient inputs, utilization and cycling in the Laptev Sea constrained by macronutrient concentrations and stable silicon isotopes’ contribution: Talk. Goldschmidt virtual, 2021.


Erdem Z., Doering K., Schneider R., Sinninghe Damsté J. S. and S. Schouten: ‘Upwelling history from northern Peruvian margin over the last 25 thousand years: A multi-proxy approach’ contribution: Poster. AGU fall meeting, 2020.

Glock, N., Sarnthein, M., Doering, K., Mollenhauer, G., and Salvatteci, R.: Deglacial 14C reservoir ages of surface waters at the northern boundary of Peruvian coastal upwelling, EGU General Assembly 2020, Online, 4–8 May 2020, EGU2020-4727,, 2020.

Kienast, M., Davin, S., Doering, K., Hebbeln, D., Kienast, S., Lehmann, N., Schneider, R., Sherwood, O., and Weiser, J.: Isotopic evidence for changes in the origin and cycling of nitrogen in the Labrador Sea during the last 8,000 years, EGU General Assembly 2020, Online, 4–8 May 2020, EGU2020-12134,, 2020.


Kienast M., Davin S., Doering K., D. Hebbeln, S. S. Kienast, M. F. Lehmann, N. Lehmann, R.R. Schneider, O. Sherwood, J. Weiser: ‘Gauging Arctic and Northwest Atlantic nitrogen cycling from Labrador Sea nitrogen isotopes’ Contribution: Poster.13th International Conference on Paleoceanography (ICP13), Sydney, Australia, 2019.

Doering K, Kienast M, Kienast S S, Frank M, Schneider R: ‘Linking changes in siliceous primary productivity in the Labrador Sea to ocean-atmosphere climate dynamics during the Holocene’ Contribution: Poster13th International Conference on Paleoceanography (ICP13), Sydney, Australia, 2019.

Doering K., Grasse P. and M. Frank: ‘Silicon isotope signatures of radiolarian and their potential to track changes in past seawater nutrient concentrations’ Contribution: Poster, Goldschmidt Conference, Barcelona, Spain, 2019.

Laukert G., Grasse P., Doering K., Novikhin A., Povazhny V., Frank M.and H. Kassens: ‘Spatial and temporal variability in supply, transport and utilization of silicate in the Laptev Sea based on dissolved stable silicon isotopes’ Arctic Science Summit Week (ASSW), Arkhangelsk, Russia 2019.


Doering K., Grasse P. and M. Frank: ‘Silicon isotope signatures of different radiolarian species off Peru: the potential to track changes in the signatures of past water masses’ Isotopes in Biogenic Silica (IBiS) Meeting 2017 in Blanes, Spain, 2017.


Doering K., Robinson R. S., Martinez P., Ehlert C., Frank M. and R. Schneider, ‘Disentangling the deglacial biogeochemical nutrient cycle off Peru based on bulk sediment, diatom-bound δ15N and δ30Si records’ Contribution: Poster12th International Conference on Paleoceanography (ICP12), Utrecht, Netherlands, 2016.


Doering K., Ehlert C., Grasse P., Crosta X., Fleury S., Frank M. and R. Schneider: ‘Combining Silicon Isotope Signatures and diatom assemblages to trace variations in the silicate utilization and upwelling intensity off Peru’ Contribution: oral presentation Isotopes in Biogenic Silica (IBiS) Meeting, University College London, UK, 2015.


Doering K., Ehlert C., Crosta X., Frank M. and R. Schneider: ‘Comparison of stable silicon isotope compositions of biogenic opal and diatom assemblages: A deglacial to Holocene records o the Peruvian upwelling’ Contribution: Poster, Ocean Sciences Meeting, Honolulu, HI, 2014.


Doering K., Ehlert C., Mollier-Vogel E., Crosta X., Robinson R.S., Frank M. and R. Schneider: ‘Stable silicon and nitrogen isotope compositions – Deglacial to Holocene changes of the nutrient cycling off Peru’ Contribution: Poster11th International Conference on Paleoceanography (ICP11), Sitges, Spain, 2013.

Invited Talks


Colloquium presentation ‘Tools to decipher the past Silica Cycle – Silicon isotope compositions of diatoms, radiolaria and sponges’ virtual oral presentationat the Geowissenschaftliches Kolloquium Wintersemester 2022/2023, Goethe University, Frankfurt, Germany.


Keynote ‘The Si isotope signature of radiolarians – drivers of their shell signatures and inter -species difference’ within the session ‘Deciphering past climates and biogeochemical cycles with geochemical proxy archives’ at the GeoMin Köln 2022.


Seminar presentation ‘The Marine Silicon Cycle: Can we reconstruct past silica concentrations’ and its utilisation’, within an Online-Seminar series in Geochemistry of the Research Group for Marine Geochemistry at the University of Oldenburg, Oldenburg, Germany.


Seminar presentation ‘Biogeochemical proxies off Peru: past changes in upwelling, productivity and nutrient cycling’ within the Department of Geology at Lund University. Lund, Sweden.

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